<template>
  <div class="upload-container">
    <el-upload
      :data="dataObj"
      :multiple="false"
      :show-file-list="false"
      :on-success="handleImageSuccess"
      class="image-uploader"
      drag
      action="https://httpbin.org/post"
    >
      <i class="el-icon-upload" />
      <div class="el-upload__text">
        将文件拖到此处，或<em>点击上传</em>
      </div>
    </el-upload>
    <div class="image-preview">
      <div v-show="imageUrl.length>1" class="image-preview-wrapper">
        <img :src="imageUrl+'?imageView2/1/w/200/h/200'">
        <div class="image-preview-action">
          <i class="el-icon-delete" @click="rmImage" />
        </div>
      </div>
    </div>
  </div>
</template>

<script>

export default {
  name: 'SingleImageUpload'
}
</script>

<script setup>
import { defineEmits, defineProps, ref, reactive, computed, getCurrentInstance } from 'vue'
import { getToken } from '@/api/qiniu'

const { ctx } = getCurrentInstance()

const props = defineProps({
  modelValue: {
    type: String,
    default: ''
  }
})

const emits = defineEmits(['update:modelValue'])

const tempUrl = ref('')
const dataObj = reactive({
  token: '',
  key: ''
})

const imageUrl = computed(() => props.modelValue)

const rmImage = () => {
  emitInput('')
}

const emitInput = val => {
  emits('update:modelValue', val)
}

const handleImageSuccess = () => {
  emitInput(tempUrl.value)
}

const beforUpload = () => {
  return new Promise((resolve, reject) => {
    getToken().then(response => {
      const key = response.data.qiniu_key
      const token = response.data.qiniu_token
      ctx._data.dataObj.token = token
      ctx._data.dataObj.key = key
      tempUrl.value = response.data.qiniu_url
      resolve(true)
    }).catch(err => {
      console.log(err)
      reject(false)
    })
  })
}

</script>

<style lang="scss" scoped>
@import '../../styles/mixin.scss';

.upload-container {
  width: 100%;
  position: relative;
  @include clearfix;
  .image-uploader {
    width: 60%;
    float: left;
  }
  .image-preview {
    width: 200px;
    height: 200px;
    position: relative;
    border: 1px dashed #d9d9d9;
    float: left;
    margin-left: 50px;
    .image-preview-wrapper {
      position: relative;
      width: 100%;
      height: 100%;
      img {
        width: 100%;
        height: 100%;
      }
    }
    .image-preview-action {
      position: absolute;
      width: 100%;
      height: 100%;
      left: 0;
      top: 0;
      cursor: default;
      text-align: center;
      color: #fff;
      opacity: 0;
      font-size: 20px;
      background-color: rgba(0, 0, 0, .5);
      transition: opacity .3s;
      cursor: pointer;
      text-align: center;
      line-height: 200px;
      .el-icon-delete {
        font-size: 36px;
      }
    }
    &:hover {
      .image-preview-action {
        opacity: 1;
      }
    }
  }
}

</style>
